/*-
 * #%L
 * hms-lambda-handler
 * %%
 * Copyright (C) 2019 - 2022 Amazon Web Services
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

package com.amazonaws.athena.hms.handler;

import com.amazonaws.athena.hms.AlterDatabaseRequest;
import com.amazonaws.athena.hms.AlterDatabaseResponse;
import com.amazonaws.athena.hms.HiveMetaStoreClient;
import com.amazonaws.athena.hms.HiveMetaStoreConf;
import com.amazonaws.services.lambda.runtime.Context;
import org.apache.hadoop.hive.metastore.api.Database;
import org.apache.thrift.TDeserializer;

public class AlterDatabaseHandler extends BaseHMSHandler<AlterDatabaseRequest, AlterDatabaseResponse>
{
    public AlterDatabaseHandler(HiveMetaStoreConf conf, HiveMetaStoreClient client)
    {
        super(conf, client);
    }

    @Override
    public AlterDatabaseResponse handleRequest(AlterDatabaseRequest alterDatabaseRequest, Context context)
    {
        HiveMetaStoreConf conf = getConf();
        try {
            context.getLogger().log("Connecting to HMS: " + conf.getMetastoreUri());
            HiveMetaStoreClient client = getClient();

            context.getLogger().log("Altering database " + alterDatabaseRequest.getDbName());
            TDeserializer deserializer = new TDeserializer(getTProtocolFactory());
            Database newDatabase = new Database();
            deserializer.deserialize(newDatabase, alterDatabaseRequest.getDbDescription().getBytes());
            boolean isSuccessful = client.alterDatabase(alterDatabaseRequest.getDbName(), newDatabase);
            AlterDatabaseResponse alterDatabaseResponse = new AlterDatabaseResponse();
            alterDatabaseResponse.setSuccessful(isSuccessful);

            return alterDatabaseResponse;
        }
        catch (Exception e) {
            context.getLogger().log("Exception: " + e.getMessage());
            throw new RuntimeException(e);
        }
    }
}